alistair23-linux/drivers/gpu/drm/msm/Kconfig

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config DRM_MSM
tristate "MSM DRM"
depends on DRM
depends on ARCH_QCOM || (ARM && COMPILE_TEST)
depends on OF && COMMON_CLK
depends on MMU
drm/msm: gpu: Enable zap shader for A5XX The A5XX GPU powers on in "secure" mode. In secure mode the GPU can only render to buffers that are marked as secure and inaccessible to the kernel and user through a series of hardware protections. In practice secure mode is used to draw things like a UI on a secure video frame. In order to switch out of secure mode the GPU executes a special shader that clears out the GMEM and other sensitve registers and then writes a register. Because the kernel can't be trusted the shader binary is signed and verified and programmed by the secure world. To do this we need to read the MDT header and the segments from the firmware location and put them in memory and present them for approval. For targets without secure support there is an out: if the secure world doesn't support secure then there are no hardware protections and we can freely write the SECVID_TRUST register from the CPU. We don't have 100% confidence that we can query the secure capabilities at run time but we have enough calls that need to go right to give us some confidence that we're at least doing something useful. Of course if we guess wrong you trigger a permissions violation which usually ends up in a system crash but thats a problem that shows up immediately. [v2: use child device per Bjorn] [v3: use generic MDT loader per Bjorn] [v4: use managed dma functions and ifdefs for the MDT loader] [v5: Add depends for QCOM_MDT_LOADER] Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> [robclark: fix Kconfig to use select instead of depends + #if IS_ENABLED()] Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-05-17 08:45:29 -06:00
select QCOM_MDT_LOADER
select REGULATOR
select DRM_KMS_HELPER
select DRM_PANEL
select SHMEM
select TMPFS
select QCOM_SCM
select SND_SOC_HDMI_CODEC if SND_SOC
select SYNC_FILE
select PM_OPP
default y
help
DRM/KMS driver for MSM/snapdragon.
config DRM_MSM_REGISTER_LOGGING
bool "MSM DRM register logging"
depends on DRM_MSM
default n
help
Compile in support for logging register reads/writes in a format
that can be parsed by envytools demsm tool. If enabled, register
logging can be switched on via msm.reglog=y module param.
config DRM_MSM_HDMI_HDCP
bool "Enable HDMI HDCP support in MSM DRM driver"
depends on DRM_MSM && QCOM_SCM
default y
help
Choose this option to enable HDCP state machine
config DRM_MSM_DSI
bool "Enable DSI support in MSM DRM driver"
depends on DRM_MSM
select DRM_PANEL
select DRM_MIPI_DSI
default y
help
Choose this option if you have a need for MIPI DSI connector
support.
config DRM_MSM_DSI_PLL
bool "Enable DSI PLL driver in MSM DRM"
depends on DRM_MSM_DSI && COMMON_CLK
default y
help
Choose this option to enable DSI PLL driver which provides DSI
source clocks under common clock framework.
config DRM_MSM_DSI_28NM_PHY
bool "Enable DSI 28nm PHY driver in MSM DRM"
depends on DRM_MSM_DSI
default y
help
Choose this option if the 28nm DSI PHY is used on the platform.
config DRM_MSM_DSI_20NM_PHY
bool "Enable DSI 20nm PHY driver in MSM DRM"
depends on DRM_MSM_DSI
default y
help
Choose this option if the 20nm DSI PHY is used on the platform.
config DRM_MSM_DSI_28NM_8960_PHY
bool "Enable DSI 28nm 8960 PHY driver in MSM DRM"
depends on DRM_MSM_DSI
default y
help
Choose this option if the 28nm DSI PHY 8960 variant is used on the
platform.
config DRM_MSM_DSI_14NM_PHY
bool "Enable DSI 14nm PHY driver in MSM DRM (used by MSM8996/APQ8096)"
depends on DRM_MSM_DSI
default y
help
Choose this option if DSI PHY on 8996 is used on the platform.